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A Novel Development for Vapor Phase Alkylation of Aniline Processed with Clay, Oxides and Zeolite

Kotaiah Naik Dhanavath, Satyavathi Bankupalli, Jayashree Anireddy

Abstract


Vapour phase catalytic alkylation of aniline with ethanol is carried out over new catalysts including clay (attapulgite, and bentonite), metal oxides (Fe2O3 impregnated on attapulgite, and Fe2O3 + GeO2 supported on attapulgite) and zeolites (ZSM–5) in a down flow reactor. The reaction conditions viz temperature, molar ratio (aniline/ethanol) and catalyst lead to both C– and N–alkylation, with highest conversion of aniline to ethanol at 370°C temperature and 1:6 molar ratio over clay, metal oxides and zeolites catalysts 20%, 53% and 49.35%, 57.62% respectively. Among the tested catalysts, ZSM–5 showed excellent catalytic performance with the highest conversions of 80–98%. The clays were found to be excellent catalysts for N–alkylation of aniline. Further when these clays impregnated with a combination of metal oxides, the activity for C–alkylation of aniline. The main products conversion of aniline to ethanol monoethyl aniline, N, N–diethylaniline, ortho ethylaniline and 2, 6–diethylaniline were formed consecutively.

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